Table 4: Comparison of treatment changes between the extraction group and the non-extraction group.
| Measurements | Extraction group(n = 30)(mean ± SD) | Non-extraction group(n = 30)(mean ± SD) | Comparisons P Value |
| Skeletal | |||
| SNA (deg) | -0.3 ± 1.4 | -0.9 ± 1.9 | 0.154 |
| SNB (deg) | 0.1 ± 1.3 | -0.1 ± 1.4 | 0.667 |
| ANB (deg) | -0.4 ± 1.3 | -0.9 ± 1.3 | 0.222 |
| SN-MP (deg) | 0.7 ± 1.2 | 1.0 ± 1.6 | 0.369 |
| SNPog (deg) | 0.9 ± 1.2 | 0.2 ± 1.5 | 0.034* |
| Pog to Y axis (mm) | 2.1 ± 2.7 | 0.8 ± 3.4 | 0.125 |
| Dental | |||
| U1-NA (deg) | -15.5 ± 6.5 | -5.0 ± 5.8 | 0.000** |
| U1-NA (mm) | -5.8 ± 2.2 | -1.3 ± 2.2 | 0.000** |
| L1-NB (deg) | -7.2 ± 8.6 | 9.6 ± 7.0 | 0.000** |
| L1-NB (mm) | -2.5 ± 2.8 | 2.5 ± 1.8 | 0.000** |
| Pharyngeal airway | |||
| PM-UPW (mm) | 0.4 ± 1.2 | 1.1 ± 2.3 | 0.132 |
| U-MPW (mm) | -0.2 ± 1.9 | 0.7 ± 2.2 | 0.094 |
| PASmin (mm) | -0.8 ± 2.7 | -0.1 ± 2.5 | 0.361 |
| V-LPW (mm) | 0.8 ± 2.2 | 1.4 ± 3.4 | 0.393 |
| Soft palate | |||
| NL/PM-U (deg) | -0.3 ± 3.2 | -1.3 ± 3.7 | 0.288 |
| PM-U (mm) | 0.3 ± 1.2 | 0.6 ± 1.4 | 0.406 |
| SP-T (mm) | 0.1 ± 0.6 | 0.4 ± 0.8 | 0.066 |
| Tongue position | |||
| H-VT (mm) | 1.6 ± 2.7 | 2.7 ± 4.2 | 0.223 |
| VT (mm) | 0.6 ± 4.0 | 3.8 ± 5.7 | 0.015* |
| V-CV (mm) | 0.5 ± 1.9 | 1.7 ± 3.3 | 0.085 |
| V-FH (mm) | 8.2 ± 4.5 | 6.9 ± 7.0 | 0.397 |
| Hyoid position | |||
| AH-CV (mm) | 1.9 ± 2.9 | 1.3 ± 2.5 | 0.448 |
| AH-FH (mm) | 7.3 ± 5.1 | 6.2 ± 7.1 | 0.493 |
*P ≤ 0.05; **P ≤ 0.01.